Collapsible core



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Patented Sept. 16, 1924.

satana ser 'ggf HAROLD A. DnNr/rrnn, lon AKRON, onto, assrefNoR ro THE GENERAL TIRE AND RUBBER COMPANY, or AKRON, OHIO, .a CORPORATION or OHIO.

COLLAFSIBLE' CORE.

Application filed March 16, 1923. Serial No. 625,487.

To all whom t may concern:

Be it known that HAROLD A. DENMmE, a citizen of the United States, residing at Akron, in the county of Summit, State of Ohio, have invented certain new and useful Improvements in Collapsible Cores, of which the following is a specification.

This invention relates to collapsible cor-es, such as have been more recently developed and used in tire factories which are characterized by the fact that the collapsing and restoring mechanism for the core is attached to or embodied with the core itself. Such a type of core is shown, for example, in my prior Patent No. 1,358,941 and it is the object of the present invention to improve upon the collapsing mechanism for withdrawing the core sections and subsequently restoring them to circular form.

The object of the present invention is toy simplify and render more' compact the mechanism for collapsing the core.

Other objects and advantages will be apparent from the description of the invention, the drawings showing one embodiment thereof, but it will be understood that changes and modifications may be made without departing from the essential features of the invention.

In the drawings:

Figure 1 is a front elevation of the core, a portion thereof having been broken away to show the construction to better advanta e; I

'gFigure 2 is a similar view with the core partially collapsed;

Figure 3 is a transverse section through the core;

Figure 4 is a. detailed view, one of' the operating members beingr partially withdrawn; and

Figure 5 is a section on the line 5-5 of Figure 4.

Cores lof the general type shown herein are characterized by the presence `of two pairs of oppositely arranged sections, each pair of which has attached thereto a linkage or equivalent mechanism by which the sections may be withdrawn inwardly toward the center of the core orxthe shaft. One pair of these sections, which are usually termed key sections, are withdrawn first toward the center of the core in the general plane of the core and then moved laterally away from the plane ofthe core so as to make ,room for the inward movement of the other sections.

1n the drawings, the key sections are indicated by the numerals 1 and 2 and the complementary sec-tions by the numerals 3 and 4, it being noted that the key sections have a slight outward taper or draft, soI as to enable them to be easily withdrawn, and also that the several sections have mating keys 5 and keyways 6.`

The shaft which supports the core and which may be the shaft of a tire making machine is indicated iby the numeral 7. On this shaft is slidably mounted a hub 8 whichuis prevented from rotation relative to the shafty by a key 9. The hub is provided with anextended and reduced bearing sleeve 10. Arranged on the shaft 7 and facing the hub 8 is a second hub 11, which is rigidly keyed'to the shaft at 12 and which is also provided with a reduced extended sleeve 13.` The opposing faces of the two hubs are formed with diametrical grooves or channels 14 as shown in Figure 5.

Secured in the diametrically Opposite channels on the hub 8 are radially extending arms 15 and in the complementary channels in the hub 11 are the radially extending arms 16. vThe arms 15 are received. in openings 17 formed in ears or lugs 18 on the inner circumference of the key sections 1 and 2, the openings being preferably provided with bushings 19, while directly opposite the said openings apertures'20' are cut in the outer wall of the cores through which the arms may project when the core is in collapsed position, as shown in Figure 2. The arms 16 are similarly received in lugs 21 on the sections 3 and 4.

The sections 1 and 2 are moved radially of the core Iby. means of pairs of links 22, e

which links are connected at their outer ends to l.shaped brackets 23, each of which is pivoted at 24 within recesses in the lugs 18, the laterally extending portions being received lbetween adjusting nuts 25 on the outer ends of the links 22. The inner ends of the links 22 have screw-threaded engagement with lugs 26 which are pivoted on pins 27 which are carried at diametrically opposite points on the inner surface of a hand wheel 28 that is rotatably mounted on the extended sleeve 10 of the hub8. A collar 29 retains the wheelin position.

The sections 3 and 4 are moved toward and away from the shat't by linlrs 30 which are pivoted to those sections and to a hand wheel 3l in the manner described with respect to the sections l and 2.

lVhen it is desired to collapse the core, the hand wheel 28, which is preferably the outer wheel, is rotated until the key sections l and 2 are withdrawn to their fully contracted position as shown in Figure 2, at which time the lugs 18 will contact the enlarged portion of the hub 8. To position the sece tions, recesses 32 may be termed in the lugs which mate with projections 33 on the hub. At this point it will be noted that all ot the arms l5 and 'i6 are in a common plane which is coincident with the central core plane, the arms being twice the depth ot the recesses ll so that when the core is assembled the hubs and arms mate as shown in Figure 3 and as indicated in Figure l.

lWhen the lrey sections are in the position shown in Figure 2, the hand wheel 28 and the parts carried thereby with the sleeve 8 are moved outwardly away 'from the plane of the core and out of the way ol the sections 8 and l. rlhe hand wheel 3l, which is mounted similarly to the wheel 28, is now rotated and the sections 3 and l withdrawn to collapsed position. The tire may then be removed and the core restored to lull circular condition.

As has been stated, the construction shown and described affords an extremely compact and simple mechanism for the purposes oit' the invention, but such invention may be embodied in other forms, and details such as have been described are not essential eX- cept insofar as the prior art and the claims herein may be fairly held to limit `What l claim is:

l. ln a collapsible core, a plurality ot core sections, all of said sections being movable toward and from the center oi the core, and radially extending arms for guiding the sections in their radial movement, said arms being located in the common plane at the center line 01"' the core, certain or' the sections beingmovable laterally of the core.

2. ln a collapsible core, a plurality of core sections, all of said sections being movable toward and away from the center of the core and certain of said sections being movable laterally of the core plane, and radially extending arms having sliding engagement with the sections in their radial movement, said arms when the core is assembled being located within the vertical bounds of the core.

3. ln a collapsible core, a plurality of core sections, certain of said sections being movable in a straight line toward and from the axis ot the core, and an arm for guiding a core section, said arm passing through 'the body ot the core section.

ln a collapsible core, a plurality of core sections, a shalt, two hubs located on said shaft and movable toward and from each other, and guiding arms secured to the hubs in diametrically arranged pairs right angles to each other, the arms lying in a common plane when the hubs are positioned at 'their inward limit oi incitement.

5. ln a collapsible core, a plurality of core sections, a supporting shaft, and a. guiding arm for one ot said sections, said section being apertnred for the reception ot the arm.

6. ln a collapsible core, a plurality ot core sections, a sup} 9orting` shaft, a number oil guiding arms equal to the number of sections, and all located in the central plane ot the core, the sections being provided with radial openings to receive the arms.

7. ln a collapsible core, a plurality ot core sections which in expanded position abut end to end to form a complete annular core, a plurality of radial arms equal to the num ber ot' core sections, certain of said arms being movable laterally of the core and means upon each core section to receive an arm for sliding movement, the several a'rms being located in a common plane when thev core is expanded.

8. A collapsible core comprising plurality of core sections, one of said sections being provided with a radial aperture, and a guiding arm tor a core section, the arm being receivable in the aperture when the core is in collapsed position.

l-lAltLD A. DENMRE 

